Answer:
m = 35
Explanation:
2m + m -15 = 90
3m -15 = 90
+15 +15
3m = 105
/3 /3
To check the work just insert 35 for m:
2(35) + 35 -15 = 90
70 + 35 -15 = 90
105 - 15 = 90
90 = 90
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